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fgiga [73]
3 years ago
11

What are the various speculation on the existance of life or how did life form on earth?​

Biology
1 answer:
Helen [10]3 years ago
5 0

Answer:

In evolutionary biology, abiogenesis, or informally the origin of life (OoL), is the natural process ... For the oldest life forms, see Earliest known life forms. ... There are several principles and hypotheses for how abiogenesis could have occurred. ... In 2017 scientists found possible evidence of early life on land in 3.48 Gyo

Explanation:

Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects. We can only speculate about these questions, since we haven't yet found any life forms that hail from off of Earth. But we can think in a more informed way about whether life might exist on other ... When did life appear on Earth? ... For many millions of years, early Earth was pummeled by asteroids and other celestial objects.

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FILL OUT THE BLANKS PLS!!
Vladimir [108]

Answer:

If leaf color change is related to temperature, then exposing plants to low temperatures will result in changes in leaf color:

Independent: <u>temperature</u>.

Dependent: <u>leaf color</u>.

Other variable(s): According to the information, <u>there are no other variables</u>.

Explanation:

When formulating a hypothesis, it is inevitable that the presence of variables on which the hypothesis is formed is established. The hypothesis raised is the <u>effect of temperature on the color change of the leaf of a plant</u>.

The<em> independent variable</em>, used in research work, is an element that does not depend on other variables but can influence the behavior of the dependent variable. In this case, the independent variable is the temperature. In addition, the independent variable can be managed to observe its effect on other variables.

An <em>dependent variable</em> is a characteristic that is influenced or modified by the presence of other variables, such as the independent variable of a study. In this case is the color of the leaf of a plant.

7 0
3 years ago
Humans and chimpanzees share some DNA and protein sequences:
liberstina [14]

Answer:

The DNA sequence that can be directly compared between the two genomes is almost 99 percent identical. When DNA insertions and deletions are taken into account, humans and chimps still share 96 percent of their sequence. At the protein level, 29 percent of genes code for the same amino sequences in chimps and humans.

Explanation:

8 0
3 years ago
When looking at an active metabolite of a medication, such as 9-hydroxyrisperidone (paliperidone), how does it differ from the p
cluponka [151]

Paliperidone has low affinity for lipid-rich environments compared from the parent compound risperidone. Due to its hydrophilicity characteristic, paliperidone is capable of hydrogen bonding with other molecules containing water and hydroxyl groups. Lipophilicity is a determining factor for the rate and degree of metabolism of the drug in the body and for crossing the blood–brain barrier (BBB).

Moreover, these differences are implicated in synaptic plasticity and neuronal firing effects in the mechanism of mitochondrial movement, protein expression, and phosphorylation of the drug. Paliperidone as a mood stabilizer is an active metabolite of risperidone with antipsychotic effects used for the treatment of schizophrenia and its associated disorders.

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3 years ago
I NEED HELP ASAP (WILL MARK BRAINLIEST IF ITS THE RIGHT ANSWER) which of the following describes asexual reproduction
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<em>B. One parent organism and no egg or sperm.</em>

Explanation:

In asexual reproduction, an organism can produce offspring with no gametes involved (eggs or sperm), and does not need to undergo meiosis.

If an organism produces offspring through asexual reproduction, all of the DNA from the parent will go to the offspring. Since there is only one parent, meiosis will not occur since there is no need for genetic differentiation.

All of the organisms produced by the parent during asexual reproduction will be identical to the parent. They will have the same DNA and genetic make up.

5 0
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Answer: happen or take place

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